Machine for rolling screw-nut blanks.



PATENTED AFR. 10, 1906.

T. M. ANDERSON 6: R. WORMALD. MACHINE FOB. ROLLING SCREW NUT BLANKS.

APPLIOATION FILED MAY15, 1905.

2 SHBETB-SHBET 1.

PATENTED APR. 10, 1906 T. M. ANDERSON & R. WORMALD.

MACHINE FOR ROLLING SCREW NUT BLANKS. APPLICATION FILED MAY15, 1905.

, UNITED STATES PATENT OFFICE OLDHAM,

MACHINE FOR ROLLING SQREW-NUT BLANKS.

Specification of Letters Patent.

Patented April 10, 1906.

- Application filed May 15, 1905. Serial No. 260,467.

To all whom it may concern:

Be it known that we, THOMAS MILLS ANDERSON and Roscoe WORMALD, subjects of the King of Great Britain, residing at Old ham, in the county of Lancaster, England, have invented new and useful Improvements in Machines for Rolling Screw-Nut Blanks, of which the following is a specification.

This invention has for its object to rovide an improved construction of mac ine whereby screw-nut blanks in bars having serrations or indentations at each edge of a shape corresponding with that of the nut to be produced can be rolled successfnlly-that is to say, to such a nicety that the consecutive nut-blanks can be more readily separated from each other and require less finishing than hitherto has been the case, and there is practically no waste of material. We attain these objects by the mechanism illustrated in the accompanying two sheets of drawings, in which- Figure 1 is a front View, of a machine for rolling screw-nut blanks constructed in accordance with our invention.

Figs. 3 and 5 are vertical sections at lines A A and B B of Figs. 4 and 6, respectively, and the latter sectional plans of Figs. 3 and 5 while Fig. 7 is a sectional end rolls enlarged.

Similar lettersrefer to similar parts throughout the several views.

In carrying out our invention and referring to the figures generally we employ in suitable bearings in the frame a of the machine above each other two horizontal shafts b and c, suitably geared together-say by spur-pinions view of the -d-and one shaft having rotary motion 1mparted-say by spur-wheel e and pinion ffrom any suitab e source. Upon the said shafts are secured a pair of rolls g and h in conjunction with another pair of rolls i and is, secured upon vertical shafts mounted in bearings l l at the side and at a right angle to the rolls 9 and h, leaving a space between the four rolls 9 h and 'L k, forming a nip for the bar m, Sheet II, corresponding with the section of the nut to be rolled. The sides of the upper and lower rolls gand it have recesses 71, (see more particularly Figs. 3, 4, 5, 6, and 7 which are opposite each other and extend through the edges to near the middle of the roll, while the said side rolls 'i and have on their p eripheries and Fig. 2 a plan,

tooth-like projections 0,

which at each edge of the rolls are adapted to en age in the recesses a and gear with the rol s g and h, so as to cause the four rolls to work in strict unison with each other. In passing the hot bar m through the said rolls the middle part of the tOOtll-llkG'PIOjBCtlOIlS 0 on the side rolls i and 7c press into and thereby form the desired serrations or mdentations q in the edges of the bar m, (see more particularly Figs. 4, 5, and 6,) while the periphery of the top and bottom rolls 9 and h and the middle part of the periphery of the side rolls i and k prevent the bar m from spreading. j 1

The peri instance, of both of the top and bottom rolls g and h may have studs 10 adapted to press holes 1' into one or both sides of the bar m as it passes through the rolls and is serrated or indented by the tooth-like projections of the side rolls i and 70, (see more particularly Flgs. 3, 4, and 7,) which holes form the-nut-holes for the blanks. The studs p also insure a regular and uniform feed of the bar m.

What we claim as our invention, and desire to secure by Letters Patent, is-

In a machine for rolling screw-nut blanks, the combination of two pairs of rolls mounted at right angles to each other, one of the said air of rolls having in the middle peripherally flat faces corresponding in outline wit the nut-blanks to be rolled and between them from the middle to each the other pair of rolls V projections strai ht in the middle and continuing at an inc ine to each side of the roll, the inclined parts of the said project ons engaging in the said recesses from the sides to V-recesses inclinin side of the roll an the middle of the respective rolls and gearing the four rolls in themselves together and the straight part of the said pro ections being adapted to indent the nutlank bar at each edge which indents meet each other and form two adjacent nut-blank sides, all substantially as and for the purpose set forth.

In testimony whereof we have signed our names to this speclfication in the presence of two subscribing witnesses.

THOMAS MILLS ANDERSON. ROSCOE WORMALD.-

Witnesses:

ALFRED BOSSHARDT, STANLEY E. BRAMALL.

phery of one or, as in the present 7 

